Lenovo 70AL, Руководство по обслуживанию, Страница: 149 / 190

10. Install the four screws to secure the new heat sink and fan assembly and the backplane on the system
board. It is recommended that you carefully install the four screws using the following method to
avoid any possible damage to the system board.
a. Partially tighten screw 1 , then firmly tighten screw 2 , and then return to screw 1 and firmly tighten
it. Do not over-tighten the screws.
b. Partially tighten screw 3 , then firmly tighten screw 4 , and then return to screw 3 and firmly tighten
it. Do not over-tighten the screws.
Figure 89. Installing the screws to secure the heat sink and fan assembly and the backplane
11. Connect the heat sink and fan assembly cable to the microprocessor fan connector on the system
board. See “System board components” on page 38.
Note: If the heat sink and fan assembly cable is long, loosely wrap it.
12. If you are instructed to return the old heat sink and fan assembly, follow all packaging instructions and
use any packaging materials that are supplied to you for shipping.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the replacement, go to “Completing the parts replacement” on page 149.
Replacing the microprocessor
Attention: Do not open your server or attempt any repair before reading and understanding “Safety information”
on page iii and “Guidelines” on page 65.
This topic provides instructions on how to replace the microprocessor.
Chapter 6
.
Installing, removing, or replacing hardware
137